Set a 20 first, and then the game will ask you every day if you want to increase the intensity. If you are not satisfied, call up the control switch in the game and modify it yourself. In fact, the intensity is related to the number of movements per attack. For example, if you set 1, you may do it once or twice. But if you order 30, it may take 20-30 times. If you are in a hurry to clear customs, turn it down and spend more time on the plot. If you are not in a hurry to clear customs, it is better to choose a higher level.